A block-dropping breaker while drilling and drilling tool

Abstract

The present invention relates to a block-dropping breaker and drilling tool while drilling, which comprises: a first connection part for installation on the drill pipe; a crushing body, which is fixed to the first connection part, the crushing body having a first outer side surface, the first outer side surface being fixedly provided with crushing teeth; when the block-dropping breaker while drilling is installed on the drill pipe, the block-dropping breaker while drilling can rotate around the axis of the drill pipe, and the first outer side surface extends obliquely toward the drilling direction from an end close to the axis of the drill pipe. The present invention relates to a block-dropping breaker and drilling tool while drilling, when blocks appear on the well wall, the blocks can move downward to the gap between the first outer side surface and the well wall, and at the same time, the crushing teeth arranged on the first outer side surface can crush the blocks during the rotation of the crushing body, and can effectively crush blocks of different sizes, thereby effectively solving drill jamming and even well burial accidents caused by blocks dropping from the well wall.

Description

Technical Field

[0001] The invention relates to the technical field of oil drilling engineering tools, in particular to a while-drilling block breaker and a drilling tool. Background Art

[0002] At present, in oil drilling projects, construction workers will use oil drilling equipment to drill through multiple formations along the designed trajectory from the ground to reach the predetermined target layer (oil and gas layer or potential oil and gas layer), forming a stable channel (i.e. oil and gas well) for oil and gas production or injection of the required fluid (water, gas, steam).

[0003] In the related art, during the construction of oil drilling projects, it is often encountered that blocks fall off or even collapse occurs on the well wall where the drill bit has drilled. Once the blocks above the well wall settle in the annulus between the drill string and the well wall, the blocks accumulate on the upper part of the drill bit, which will cause wear of the drill tool or the drill bit, and even cause the drill to get stuck, resulting in the drilling construction having to be interrupted. At present, there is no effective way to resolve the drill sticking accident.

[0004] Therefore, it is necessary to design a block-dropping breaker and a drilling tool to overcome the above problems. Summary of the invention

[0005] The embodiment of the present invention provides a debris breaker while drilling to solve the problem in the related art that debris from the well wall settles in the annulus between the drill string and the well wall, accumulates on the upper part of the drill bit, causes wear of the drilling tool or the drill bit, and even causes drill sticking.

[0006] In the first aspect, a block breaker for drilling while being installed on a drill pipe is provided, which comprises: a first connecting part for being installed on the drill pipe; a crushing body, which is fixed to the first connecting part, and the crushing body has a first outer side surface, and the first outer side surface is fixed with crushing teeth for crushing blocks; when the block breaker for drilling while being installed on the drill pipe, the block breaker for drilling while being installed on the drill pipe can rotate around the axis of the drill pipe, and the first outer side surface extends obliquely toward the drilling direction from an end close to the axis of the drill pipe.

[0007] In some embodiments, the crushing tooth is substantially spherical or wedge-shaped, and the axis of the crushing tooth is perpendicular to the first outer side surface.

[0008] In some embodiments, the crushing teeth are substantially wedge-shaped, and when the crushing body rotates along with the drill rod, the width of the front end of the crushing teeth is smaller than the width of the rear end along the rotation direction.

[0009] In some embodiments, the angle between the first outer side surface and the axis of the drill pipe is less than or equal to 45°.

[0010] In some embodiments, the crushing body includes a second outer side surface connected to the end of the first outer side surface, and the crushing teeth are also fixed to the first outer side surface. When the drill bit breaker is installed on the drill pipe, the second outer side surface is arranged parallel to the axis of the drill pipe.

[0011] In some embodiments, the crushing body also includes a third outer side surface located away from one end of the first connecting portion. When the drill bit breaker is installed on the drill pipe, the third outer side surface is set at an acute angle to the axis of the drill pipe, and the inclination direction of the third outer side surface is opposite to that of the first outer side surface.

[0012] In some embodiments, a flow groove is formed on the first outer side toward the interior of the crushing body, and the flow groove extends along the axial direction of the crushing body.

[0013] In some embodiments, a flow groove is formed on the first outer side toward the interior of the crushing body, and the flow groove is spiral.

[0014] In some embodiments, the drill-while-drilling block breaker also includes a second connecting part for installation on the drill pipe; one end of the crushing body is connected to the first connecting part, and the other end is connected to the second connecting part, and when the drill-while-drilling block breaker is installed on the drill pipe, the axis of the crushing body is collinear with the axis of the drill pipe.

[0015] In a second aspect, a drilling tool is provided, which includes: a drill rod, and the above-mentioned while-drilling block breaker installed on the drill rod.

[0016] The beneficial effects brought about by the technical solution provided by the present invention include:

[0017] The embodiment of the present invention provides a block breaker while drilling and a drilling tool. Since the block breaker while drilling can be installed on the drill pipe and rotate around the axis of the drill pipe, and the first outer side surface extends obliquely toward the drilling direction from an end close to the axis of the drill pipe, after the block breaker while drilling is installed on the drill pipe, the first outer side surface is inclined downward relative to the axis of the drill pipe. When blocks appear on the well wall, the blocks can move downward to the gap between the first outer side surface and the well wall. At the same time, the crushing teeth arranged on the first outer side surface can crush the blocks during the rotation of the crushing body, and can effectively crush blocks of different sizes. Therefore, it can effectively solve the drill sticking or even well burial accidents caused by blocks falling from the well wall. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0019] Figure 1 A schematic structural diagram of a while-drilling block breaker provided by an embodiment of the present invention;

[0020] Figure 2 A partially enlarged schematic diagram of a while-drilling block breaker provided by an embodiment of the present invention;

[0021] Figure 3 The enlarged schematic diagram of another part of a while-drilling block breaker provided in an embodiment of the present invention.

[0022] In the figure:

[0023] 1. A first connecting portion;

[0024] 2. Crushing body; 21. First outer side surface; 22. Second outer side surface; 23. Third outer side surface; 24. Crushing teeth;

[0025] 3. A second connecting portion;

[0026] 4. Flow channel;

[0027] 5. Internal thread. DETAILED DESCRIPTION

[0028] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0029] The embodiment of the present invention provides a drilling block breaker and drilling tools, which can solve the problem in the related art that blocks from the well wall settle in the annulus between the drill string and the well wall, accumulate on the upper part of the drill bit, cause wear of the drilling tools or drill bit, and even cause drill sticking.

[0030] See also Figure 1As shown, a block breaker while drilling provided by an embodiment of the present invention is used to be installed on a drill pipe, wherein the block breaker while drilling may include: a first connecting part 1 for installation on the drill pipe, in this embodiment, the first connecting part 1 is located at the upper end of the block breaker while drilling, and the first connecting part 1 may be provided with an internal thread 5 or an external thread for connection with the drill pipe, and the internal thread 5 or the external thread on the first connecting part 1 is generally a standard thread in the drilling engineering industry; a crushing body 2, which may be fixed to the first connecting part 1, in this embodiment, the upper end of the crushing body 2 is connected to the lower end of the first connecting part 1, and the crushing body 2 may have a first outer side surface 21, and the first outer side surface 21 may be fixedly provided with a plurality of crushing teeth 24, and the crushing teeth 24 protrude from the first outer side surface 21, so that the crushing teeth 24 can crush the blocks; when the block breaker while drilling is installed on the drill pipe, the block breaker while drilling can rotate around the axis of the drill pipe. That is to say, the block breaker while drilling can rotate together with the drill pipe or independently of the drill pipe. At the same time, the rotation speed of the block breaker while drilling can be the same as or different from the rotation speed of the drill pipe, and the first outer side surface 21 extends obliquely toward the drilling direction from the end close to the axis of the drill pipe. That is to say, the first outer side surface 21 extends obliquely relative to the axis of the drill pipe, so that after the drill pipe equipped with the block breaker while drilling is extended into the well, the gap between the first outer side surface 21 and the well wall can gradually decrease, and the blocks above the well wall can enter the gap between the first outer side surface 21 and the well wall from top to bottom, and then the high-speed rotating crushing body 2 can crush the blocks through the crushing teeth 24, and the crushed blocks can eventually return from the annulus between the drill pipe and the well wall with the mud, thereby effectively solving the problems of increased pump pressure and stuck drill caused by poor mud return caused by block dropping and collapse downhole.

[0031] In some embodiments, the crushing teeth 24 are preferably made of carbide teeth with good wear resistance. In other embodiments, the crushing teeth 24 can also be made of other materials; and the crushing teeth 24 preferably protrude from the first outer side surface 21 by a height of 1 to 20 mm. In this embodiment, when the carbide teeth 24 on the first outer side surface 21 are projected onto one of the generatrixes of the first outer side surface 21 along the circumferential direction of the first outer side surface 21, the carbide teeth 24 can fully cover the generatrix, so that any section along the radial direction of the crushing body 2 has crushing teeth 24. This tooth arrangement method can not only improve the crushing efficiency of the well wall blocks, but also ensure the wear resistance of the drilling block breaker.

[0032] See also Figure 1As shown, in some embodiments, the angle between the first outer side surface 21 and the axis of the drill pipe can be less than or equal to 45°. Specifically, in this embodiment, the first outer side surface 21 forms a cone, and the angle between the generatrix of the cone and the axis of the drill pipe (that is, the angle between the first outer side surface 21 and the axis of the drill pipe) is fixed, and the angle can be less than or equal to 45°, so that the length of the cone along its generatrix direction can be longer, and more crushing teeth 24 can be arranged on the first outer side surface 21, so that the blocks of different sizes on the well wall can be crushed more efficiently. In other embodiments, the angle between the first outer side surface 21 and the axis of the drill pipe can change gradually from top to bottom, that is, the first outer side surface 21 can be an arc-shaped curved surface structure that is concave or convex to the crushing body 2. At the same time, the angle between each part of the first outer side surface 21 and the axis of the drill pipe can be less than or equal to 45°, which can also realize the crushing function of the present invention.

[0033] See also Figure 1 As shown, in this embodiment, the block breaker while drilling further includes a second connection part 3 for installation on the drill pipe, and the second connection part 3 is located at one end away from the first connection part 1, so that one end of the crushing body 2 is connected to the first connection part 1, and the other end is connected to the second connection part 3, and when the block breaker while drilling is installed on the drill pipe, the axis of the crushing body 2 can be colinear with the axis of the drill pipe. Specifically, the second connection part 3 can be provided with an internal thread 5 or an external thread for connection with the drill bit, so that the block breaker while drilling can be installed as a whole between the drill pipe and the drill bit. The internal thread 5 or the external thread on the second connection part 3 is generally a standard in the drilling engineering industry. Quasi-thread, the first connecting part 1 and the second connecting part 3 are preferably cylindrical, the outer diameters of the first connecting part 1 and the second connecting part 3 can be roughly equivalent to the diameter of the drill pipe, and the axes of the first connecting part 1, the crushing body 2, and the second connecting part 3 can be collinear, and also collinear with the axis of the drill pipe, so that the drill-down block breaker can be used as a part of the drill pipe without affecting the drilling parameters of the drill tool; in other embodiments, the axes of the first connecting part 1, the crushing body 2, and the second connecting part 3 may not be collinear, and at the same time, the axes of the first connecting part 1, the crushing body 2, and the second connecting part 3 may not be collinear with the axis of the drill pipe.

[0034] In some optional embodiments, the block breaker while drilling can be installed in the annulus between the drill pipe and the well wall only through the first connecting part 1, or can be installed in the annulus between the drill pipe and the well wall through the first connecting part 1 and the second connecting part 3 at the same time, that is, the block breaker while drilling is arranged in parallel with the drill pipe, and at the same time, the crushing body 2 can be any shape such as cylindrical or plate-like. After the crushing body 2 is installed on the drill pipe, the first outer side surface 21 of the crushing body 2 can be set at an acute angle to the axis of the drill pipe, so that when the block breaker while drilling is rotating, the crushing teeth 24 on the first outer side surface 21 can crush the blocks that enter around the first outer side surface 21.

[0035] See also Figure 1 and Figure 2 As shown, in some embodiments, the crushing tooth 24 can be roughly spherical or wedge-shaped, and the axis of the crushing tooth 24 can be perpendicular to the first outer side surface 21, so that when the falling block enters between the first outer side surface 21 and the well wall, the end of the crushing tooth 24 away from the first outer side surface 21 can face the falling block. During the rotational vibration process, the crushing tooth 24 can collide with the falling block to accelerate the crushing efficiency. In other embodiments, the crushing tooth 24 can also be a protrusion of other shapes protruding from the first outer side surface 21, not limited to a spherical head shape or a wedge shape.

[0036] See also Figure 1 and Figure 2 As shown, in some optional embodiments, when the crushing tooth 24 is roughly wedge-shaped, in the process of the crushing body 2 rotating following the drill pipe, the width of the front end of the crushing tooth 24 can be smaller than the width of the rear end along the rotation direction, that is, the front and rear ends of the crushing tooth 24 can be asymmetric structures, the front end is narrower, and the rear end is relatively wider. At the same time, in the process of rotation, the front end contacts with the falling blocks first, thereby increasing the ability of the crushing tooth 24 to cut and crush the falling blocks.

[0037] See also Figure 1 As shown, in some embodiments, the crushing body 2 may include a second outer side surface 22 connected to the end of the first outer side surface 21. In this embodiment, the second outer side surface 22 is connected to the lower end of the first outer side surface 21. The first outer side surface 21 may also be fixed with multiple crushing teeth 24. When the drill bit breaker is installed on the drill pipe, the second outer side surface 22 is arranged parallel to the axis of the drill pipe. Specifically, in this embodiment, the second outer side surface 22 is surrounded by a cylinder, so that the size of the gap between the second outer side surface 22 and the well wall from top to bottom is basically the same. After the first outer side surface 21 gradually crushes the blocks, if the smaller blocks enter between the second outer side surface 22 and the well wall, the second outer side surface 22 can further crush the blocks under the action of high-speed rotation and vibration to make the blocks finer.

[0038] See also Figure 1As shown, in some optional embodiments, the crushing body 2 may further include a third outer side surface 23 located at one end away from the first connecting portion 1. In this embodiment, the third outer side surface 23 is connected to the second outer side surface 22. In other embodiments, the third outer side surface 23 may also be directly connected to the first outer side surface 21. When the drill bit breaker is installed on the drill pipe, the third outer side surface 23 is arranged at an acute angle to the axis of the drill pipe, and the inclination direction of the third outer side surface 23 is opposite to that of the first outer side surface 21. That is, the first outer side surface 21 is inclined and extends from top to bottom in a direction away from the axis of the drill pipe, and the third outer side surface 23 is inclined and extends from top to bottom in a direction close to the axis of the drill pipe. At the same time, the third outer side surface 23 may also be surrounded by a cone, and the generatrix of the cone may be a straight line, so that the third outer side surface 23 extends along a fixed angle. The surface 23 may also be an arc-shaped curved surface structure that is concave inward or convex outward toward the crushing body 2. In this embodiment, the angle between the third outer side surface 23 and the axis of the drill pipe is less than 90°, preferably greater than 30°, so that the length of the cone formed by the third outer side surface 23 in the up and down directions is less than the length of the cone formed by the first outer side surface 21, which can shorten the overall length of the drill bit breaker as much as possible and improve the economy. During the drilling process of the drill pipe, when the inner diameter of the well wall below the first outer side surface 21 is smaller than the maximum outer diameter of the first outer side surface 21, by arranging the obliquely extending third outer side surface 23 at the bottom of the crushing body 2, the third outer side surface 23 can also play a role of drilling downward, thereby preventing the bottom of the crushing body 2 from being stuck by the well wall. Preferably, a plurality of crushing teeth 24 can be arranged on the third outer side surface 23 to enhance the wear resistance of the bottom of the crushing body 2.

[0039] See also Figure 1 and Figure 3 As shown, in some embodiments, the first outer side surface 21 is recessed with a flow groove 4 toward the inside of the crushing body 2, and the width and depth of the flow groove 4 are preferably less than 50 mm to prevent large pieces from falling through the flow groove 4 into the lower well section and affecting the crushing effect. In this embodiment, the flow groove 4 extends along the axial direction of the crushing body 2, that is, the flow groove 4 is a straight groove, and a plurality of flow grooves 4 can be evenly arranged along the circumference of the crushing body 2, wherein the flow groove 4 is used to allow the mud flowing out from the bottom of the drill bit to pass upward through the crushing body 2, and the flow groove 4 can extend downward to the second outer side surface 22 and the third outer side surface 23.

[0040] See also Figure 1 and Figure 3As shown, in some optional embodiments, the flow groove 4 can also be spirally shaped along the circumference of the crushing body 2, wherein the spiral direction of the flow groove 4 is determined according to the rotation direction of the crushing body 2. Looking from top to bottom, if the crushing body 2 rotates in a clockwise direction, the flow groove 4 is designed to be a right-handed spiral. If the crushing body 2 rotates in a counterclockwise direction, the flow groove 4 is designed to be a left-handed spiral, so that the extension direction of the flow groove 4 corresponds to the flow direction of the mud, thereby facilitating the smooth flow of the mud from the bottom of the crushing body 2 to the top of the crushing body 2.

[0041] The embodiment of the present invention also provides a drilling tool, which may include: a drill rod, and a block breaker installed on the drill rod, wherein the block breaker adopts the above-mentioned block breaker, and the block breaker can be installed on the lower end of the drill rod, and a drill bit can be installed on the lower end of the block breaker; when a stabilizer is provided between the drill rod and the drill bit, the block breaker is installed above the stabilizer to avoid damage to the stabilizer caused by falling blocks; since the block breaker is installed on the drill rod, the block breaker can be directly connected to the well together with the drill rod, and when no block falls, it only serves as a part of the drill string and will not affect the drilling parameters; when blocks fall from the well wall, the blocks can be crushed without delaying the footage during the drilling process, thereby avoiding the occurrence of drill sticking accidents.

[0042] The principles of a drill-while-drilling block breaker and a drilling tool provided by an embodiment of the present invention are as follows:

[0043] Since the while-drilling block breaker can be installed on the drill pipe and rotate around the axis of the drill pipe, and the first outer side surface 21 extends obliquely toward the drilling direction from the end close to the axis of the drill pipe, after the while-drilling block breaker is installed on the drill pipe, the first outer side surface 21 is inclined downward relative to the axis of the drill pipe. When blocks appear on the well wall, the blocks can move downward to the gap between the first outer side surface 21 and the well wall. At the same time, the crushing teeth 24 arranged on the first outer side surface 21 can actively crush the blocks during the rotation of the crushing body 2, and can effectively crush blocks of different sizes. Therefore, it can effectively solve the drill jamming or even well burial accidents caused by blocks falling from the well wall. The structure is simple, safe and reliable, and can be widely used in drilling construction operations where blocks are easily lost or collapsed on the well wall.

[0044] In the description of the present invention, it should be noted that the terms "upper", "lower", etc. indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific position, be constructed and operated in a specific position, and therefore cannot be understood as a limitation on the present invention. Unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be a connection between the two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to the specific circumstances.

[0045] It should be noted that, in the present invention, relational terms such as "first" and "second" are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

[0046] The foregoing is merely a specific embodiment of the present invention, which enables those skilled in the art to understand or implement the present invention. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but rather to the widest scope consistent with the principles and novel features claimed herein.

Claims

1. A drill bit breaker for mounting on a drill pipe, characterized in that: It includes: A first connecting portion (1) for mounting on the drill rod; A crushing body (2) fixed to the first connecting portion (1), the crushing body (2) having a first outer side surface (21) forming a cone, the first outer side surface (21) being fixedly provided with crushing teeth (24) for crushing the blocks; When the block-dropping breaker is mounted on the drill rod, the block-dropping breaker can rotate around the axis of the drill rod, and the first outer side surface (21) extends obliquely from the end close to the axis of the drill rod toward the drilling direction from top to bottom toward the direction away from the axis of the drill rod; the first outer side surface (21) forms a cone, and the angle between the generatrix of the cone and the axis of the drill rod is less than or equal to 45°; the crushing teeth (24) are roughly wedge-shaped, and when the crushing body (2) rotates with the drill rod, along the rotation direction, the width of the front end of the crushing teeth (24) is smaller than the width of the rear end; The crushing body (2) comprises a second outer side surface (22) connected to the end of the first outer side surface (21) and forming a cylindrical body, and the second outer side surface (22) is also fixed with the crushing teeth (24). When the drill bit breaker is installed on the drill rod, the second outer side surface (22) is arranged parallel to the axis of the drill rod; The crushing body (2) further comprises a third outer side surface (23) in the shape of a cone and located at an end away from the first connecting portion (1). When the drill bit breaker is installed on the drill rod, the third outer side surface (23) is arranged at an acute angle with the axis of the drill rod, and the inclination direction of the third outer side surface (23) is opposite to that of the first outer side surface (21). The third outer side surface (23) extends obliquely from top to bottom in a direction close to the axis of the drill rod. The angle between the third outer side surface (23) and the axis of the drill rod is greater than 30° and less than 90°, so that the length of the cone formed by the third outer side surface (23) in the vertical direction is less than the length of the cone formed by the first outer side surface (21); The first outer side surface (21) is provided with a flow groove (4) recessed toward the inside of the crushing body (2), and the flow groove (4) extends along the axial direction of the crushing body (2); The flow groove (4) is in a spiral shape along the circumference of the crushing body (2); when viewed from top to bottom, if the crushing body (2) rotates in a clockwise direction, the flow groove (4) is in a right-handed spiral shape, and if the crushing body (2) rotates in a counterclockwise direction, the flow groove (4) is in a left-handed spiral shape; When the crushing teeth (24) on the first outer side surface (21) are projected onto one of the generatrixes of the first outer side surface (21) along the circumferential direction of the first outer side surface (21), the crushing teeth (24) completely cover the generatrix, so that any cross section along the radial direction of the crushing body (2) has the crushing teeth (24).

2. The drilling block breaker according to claim 1, characterized in that: The axis of the crushing tooth (24) is perpendicular to the first outer side surface (21).

3. The drilling block breaker according to claim 1, characterized in that: The block-dropping breaker also includes a second connecting portion (3) for mounting on the drill pipe; One end of the crushing body (2) is connected to the first connecting part (1), and the other end is connected to the second connecting part (3), and when the drill bit breaker is installed on the drill pipe, the axis of the crushing body (2) is collinear with the axis of the drill pipe.

4. A drilling tool, characterized in that: It includes: A drill rod, and a drill-while-drilling block breaker as claimed in claim 1 mounted on the drill rod.

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